Imaduddin, M.H., Febriyana, N., Setiawati, Y. and Irwanto, I. 2020. Risk Factor Mild Mental Retardation in Extraordinary School at Surabaya. Jurnal Psikiatri Surabaya. 9, 2 (Sep. 2020), 34–45. DOI:https://doi.org/10.20473/jps.v9i2.20039.